Eutrophication-induced shifts cause diverse responses in the phoD community of a plateau freshwater lake

Environmental Research, Journal Year: 2024, Volume and Issue: unknown, P. 119947 - 119947

Published: Sept. 1, 2024

Language: Английский

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Prediction of Three Sediment Phosphorus Indexes on Water Column Phosphorus Across Seasons in the Xiashan Reservoir, Northern China

Water, Journal Year: 2025, Volume and Issue: 17(2), P. 218 - 218

Published: Jan. 15, 2025

Internal phosphorus (P) loading is a key driver of waterbody eutrophication. Various sediment P indexes are developed to assess risks by linking them water column P, but their seasonal reliability remains underexplored. This study evaluated, for the first time, status in Xiashan reservoir, large shallow reservoir northern China serving 9.4 million people. The ability three indexes, including exchangeable (Ex-P), Olsen (Olsen-P), and diluted HCl-extractable (HCl-P), predict concentrations was tested across February, May, August. Sediments exhibited moderate total levels (531–650 mg kg−1) high availability, with Ex-P, Olsen-P, HCl-P ranges 19–35, 58–101, 327–444 kg−1, respectively, likely due sandy composition. Water significantly correlate August (r = 0.42–0.81) not February May sediments, highlighting seasons. Sampling recommended efficiently identify critical zones internal loading, Ex-P as preferred indicator given its simple extraction strong correlation 0.81).

Language: Английский

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Influencing Factors of Phosphorus Mobility and Retention in the Sediment of Three Typical Plateau Lakes

Toxics, Journal Year: 2025, Volume and Issue: 13(2), P. 120 - 120

Published: Feb. 3, 2025

The mechanisms driving changes in the stability of phosphorus (P) sediments under lake ecosystem degradation remain poorly understood. This study investigated P-binding forms from three plateau lakes with different trophic states Yunnan Province, China, aiming to elucidate responses sediment P compositions human activities, status, and dissolved organic matter (DOM) characteristics. results showed that activity directly contributed retention. type exerted a discernible effect on mobility sediments, as eutrophic algae-type had higher content mobile-P. Moreover, DOM promoted adsorption BD-P NH4Cl-P. Generally, exogenous pollution caused by leads eutrophication decline stability. variation was largely influenced water depth. A decrease increased which increases risk endogenous pollution. plays an important role P. These insights offer novel perspective for understanding how characteristics are related loads lakes.

Language: Английский

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Spatial and Temporal Distribution of Phosphorus in Plateau River Sediments and Sediment–Water Interface: A Case Study of the Yarlung Zangbo River

Water, Journal Year: 2025, Volume and Issue: 17(4), P. 484 - 484

Published: Feb. 8, 2025

Rivers in plateau regions are more vulnerable to human activities and climate change than those plains due cold high altitude. Studying the temporal spatial distribution of phosphorus against backdrop warming is great significance for protection ecological environment rivers. This study focuses on Yarlung Zangbo River, one highest-altitude rivers world, analyzing different forms total dissolved organic carbon (TOC) concentration characteristics sediments sediment–water interfaces at time scales. The analysis indicators include (TP) (DTP) water body; ammonium chloride-extractable (NH4Cl-P), iron-bound (Fe-P), calcium-bound (Ca-P), aluminum-bound (Al-P), (OP), TOC sediments. results showed that upstream downstream sections River have relatively good quality, while middle stream section, affected by activities, has higher content body. mainly form Ca-P, indicating primary natural input through disintegration salts. During freeze–thaw cycle, matter affects adsorption release. Climate expected increase load River. Comparative studies between revealed exogenous particulate endogenous converted with facilitation main sources eutrophication risk unveils discusses mechanisms affecting concentrations key river nutrient elements, providing scientific support fragile ecosystems.

Language: Английский

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Bacterially mediated phosphorus cycling favors resource use efficiency of phytoplankton communities in a eutrophic plateau lake

Water Research, Journal Year: 2025, Volume and Issue: 277, P. 123300 - 123300

Published: Feb. 15, 2025

Language: Английский

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